package utils;
 
import java.security.MessageDigest; 
import java.security.NoSuchAlgorithmException; 

public class CriptografiaMD5 { 
    private static MessageDigest md = null; 
    static { 
        try { 
            md = MessageDigest.getInstance("MD5"); 
        } catch (NoSuchAlgorithmException ex) { 
            ex.printStackTrace(); }
    } 
    
    private static char[] hexCodes(byte[] text) { 
        char[] hexOutput = new char[text.length * 2]; 
        String hexString; 
        for (int i = 0; i < text.length; i++) { 
            hexString = "00" + Integer.toHexString(text[i]); 
            hexString.toUpperCase().getChars(hexString.length() - 2, hexString.length(), hexOutput, i * 2); 
        } 
        return hexOutput; 
    } 
    public static String criptografar(String pwd) { 
        if (md != null) { 
            return new String(hexCodes(md.digest(pwd.getBytes()))); 
        } 
        return null; 
    }
}